Yu Hang Lai
Ohio State University
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Publication
Featured researches published by Yu Hang Lai.
Optics Express | 2015
Drake R. Austin; Kyle Kafka; Simeon Trendafilov; Gennady Shvets; Hui Li; Allen Y. Yi; Urszula B. Szafruga; Zhou Wang; Yu Hang Lai; Louis F. DiMauro; Enam Chowdhury
Laser induced periodic surface structures (LIPSS or ripples) were generated on single crystal germanium after irradiation with multiple 3 µm femtosecond laser pulses at a 45° angle of incidence. High and low spatial frequency LIPSS (HSFL and LSFL, respectively) were observed for both s- and p-polarized light. The measured LSFL period for p-polarized light was consistent with the currently established LIPSS origination model of coupling between surface plasmon polaritons (SPP) and the incident laser pulses. A vector model of SPP coupling is introduced to explain the formation of s-polarized LSFL away from the center of the damage spot. Additionally, a new method is proposed to determine the SPP propagation length from the decay in ripple depth. This is used along with the measured LSFL period to estimate the average electron density and Drude collision time of the laser-excited surface. Finally, full-wave electromagnetic simulations are used to corroborate these results while simultaneously offering insight into the nature of LSFL formation.
Journal of Applied Physics | 2016
Drake R. Austin; Kyle Kafka; Yu Hang Lai; Zhou Wang; Kaikai Zhang; Hui Li; Allen Y. Yi; Louis F. DiMauro; Enam Chowdhury
Formation of high spatial frequency laser induced periodic surface structures (HSFL) in germanium by femtosecond mid-IR pulses with wavelengths between
Nature Communications | 2017
Zhou Wang; Hyunwook Park; Yu Hang Lai; Junliang Xu; Fengyuan Yang; Pierre Agostini; Louis F. DiMauro
\lambda=2.0
Physical Review A | 2017
Yu Hang Lai; Junliang Xu; Urszula B. Szafruga; Bradford K. Talbert; Xiaowei Gong; Kaikai Zhang; Harald Fuest; Matthias F. Kling; Pierre Agostini; Louis F. DiMauro
and
Physical Review A | 2016
Kaikai Zhang; Yu Hang Lai; Elias Diesen; Bruno E. Schmidt; Junliang Xu; Timothy T. Gorman; Françis Légaré; Ulf Saalmann; Pierre Agostini; Jan M. Rost; Louis F. DiMauro
3.6 \; \mathrm{\mu m}
Optics Letters | 2018
Drake R. Austin; Kyle Kafka; Yu Hang Lai; Zhou Wang; Enam Chowdhury
was studied with varying angle of incidence and polarization. The period of these structures varied from
Optics Letters | 2017
Antoine Camper; Hyunwook Park; Yu Hang Lai; Hiroyuki Kageyama; Sha Li; Bradford K. Talbert; Pierre Agostini; Thierry Ruchon; Louis F. DiMauro
\lambda/3
Optics Letters | 2017
Hyunwook Park; Antoine Camper; Kyle Kafka; Boqin Ma; Yu Hang Lai; Pierre Agostini; Louis F. DiMauro; Enam Chowdhury
to
Bulletin of the American Physical Society | 2017
Yu Hang Lai; Junliang Xu; Kaikai Zhang; Xiaowei Gong; Kent Talbert; Pierre Agostini; Louis F. DiMauro
\lambda/8
Bulletin of the American Physical Society | 2017
Bradford K. Talbert; Yu Hang Lai; Xiaowei Gong; Junliang Xu; Pierre Agostini; Louis F. DiMauro
. A modified surface-scattering model including Drude excitation and the optical Kerr effect explains spatial period scaling of HSFL across the mid-IR wavelengths. Transmission electron microscopy (TEM) shows the presence of a